Grated step for traveling stairways.



PATENTED JULY 11. 1905,

1). M. & T. R. QUAY. I GRATED STEP FOR TRAVELING STAIRWAYS.

APPLICATION FILED MAB. 27,1905.

2 SHEETS-SHEET 1 PATENTED JULY 11, 1905.

D. M. 6; T. R. QUAY. GRATED STEP FOR TRAVELING STAIRWAYS.

APPLICATION FILED MAE.27,1905.

2 SHEETS-SHEET 2 witmaoaeo UNITED STATES Patented July 11, 1905; H

PATENT OEEIcE.

DAVID M. QUAY AND THOMAS R. QUAY, OF NEW YORK, N. Y., ASSIGNORS TO TRAVELING STAIRWAY COMPANY, A CORPORATION on NEW YORK.

GRATED STEP FOR TRAVELING STAIRWAYS- SPECIFICATION forming part of Letters Patent No. 794,465, dated July 11, 1905.

Application filed March 27, 1905. Serial No. 252,362.

To all whom it may concern:

Be it known that we, DAVID M. QUAY and THOMAS RoY QUAY, citizens ofv the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Im provements in Grated Steps for Traveling Stairways, of which the following is a full and clear description.

This invention relates to grated steps for traveling stairways, and has for its object the construction of a step which will be light in weight, firm and accurate in construction, and cheap in manufacture. Traveling stairways being of necessity massive and moving in an elliptic ofier great friction resistance, opportunity for noise, Wear and tear, and are expensive in power for operation. Therefore every pound of weight taken from each step increases the efliciency of the operation of the stairway and decreases the cost of operating it; but the most important feature in this class of stairways is to so construct the gratings that they are absolutely accurate in relation to each other'and will never shift position.

The essential element of our invention consists of a solid sheet of metal having the gratings stamped or cut therein. All the other elements of the invention are tributary to this.

In the drawings, Figure 1 is an elevation of the forward end of a step, showing Wheels, shafts, and parts duly assembled. Fig. 2 is a side elevation of the step. Fig. 3 is a metal sheet with the gratings stamped therein before it is bent into step form'. Fig. 4 is a perspective view of a metal sheet after the gratings are stamped therein and bent to step form.

Like numerals indicate-like parts in all the figures.

1 is the metal sheet having the slots or gratings 2 cut or stamped therein. This metal sheet is preferably made of steel, though it maybe of aluminium or any other suitable metal. It may be of any desirable thickness; but in steel one-fourth of an inch is found to be the preferable dimension. The slots or gratings may be stamped, sawed, or cut in any practicable way. When stamped, the sheet is formed up to shape after the slots are stamped in. When sawed, the sheet is formed to shape first, and then the slots are sawed in, as indicated in Fig. 4, by the saw 3 in the slot 2. End plates 4 and 5 are joined to the ends of the bent grated step 1 by means of an angle-iron 6, which is bolted to the grated plate and the end plate by bolts 7 We do not limit ourselves to the angle-iron as means of joining these two plates together, for it is manifest that the end plate 4 may be flanged and the flange bolted to the grated plate. The truck or step wheels 8, 9, l0, and 11 and the guide-Wheels 12 and 13 are carried by shafts journaled in flange-plates 14, which are rigidly bolted to the end plate 4. A moving wooden balustrade section 15, shown as broken off, Fig. 1, is fastened to the end plate on its inside by the screws 16. In order to admit this balustrade to close contact with the end plate 4, the angle-iron 6 is omitted on the top of the plate. A steel bar or plate 17, running the full length of the step, is riveted to the lower or rear side of the grated plate'l to stiffen it. A similar bar 18 is riveted to the forward lower end of the grated plate 1 for the same purpose.

It will be seen that this construction forms a light, cheap, accurate, simple, and effective device for the purpose.

What we claim as new is 1. A grated step for traveling stairways the riser and tread whereof are composed of a sheet of stiff material having a series of substantially parallel slots or gratings formed therein from front to rear of said step.

2. Agrated step for traveling stairways, the gratings whereof are formed in a solid sheet of metal bent to form and having end plates joined to said bent sheet and carrying truckshafts.

3. A grated step for traveling stairways,

composed of agrated tread-piece formed from a solid metal sheet, by stamping or cutting the gratings therein, and end plates joined to said grated tread-piece by angle-irons.

4. A grated step for traveling stairways com posed of a grated tread-piece, formed from a solid metal sheet by stamping or cutting therein, and stiffening-plates 0n the forward I the gratings therein, end plates joined to said and rear sides of said grated tread-piece.

grated tread-piece, and journal-bearings bolt- In testimony whereof we a-ifix our signatures ed to said end pieces. in presence of two subscribing witnesses.

5 5. A grated step for traveling stairways DAVID M. QUAY.

composed of a grated tread-piece formed from THOMAS R. QUAY. a solid metal sheet by stamping or cutting Witnesses: the gratings therein, end plates joined to said GEORG DEZENDORF,

grated tread-piece having journal-bearings I CHAS. HESS. 

